RS-485 Modbus RTU analog input module
WB-MAI2-mini / СС v.3
2 analog inputs, 0–20 mA
WB-MAI2-mini / СС v.3
$31.03
Retail price
In stock 79 pcs. ,
  • 79 pieces are already at the warehouse
  • 240 more in 1-2 weeks

A dual-channel analog input module (0–20 mA). Designed for installation in junction boxes and cable ducts. Communication interface – Modbus RTU.

Used for connecting sensors with interface 0–20 mA and 4–20 mA in dispatching systems for engineering infrastructure and process control systems.

KEY FEATURES

Advantages
  • compatible with both 0–20 mA and 4–20 mA sensors
  • can be installed in junction boxes and cable ducts
  • channel filtering with configurable averaging time to suppress sharp current spikes caused by interference
  • compatible with third-party controllers
  • wide power supply range: 9…28 V
  • quick and easy integration with automation and monitoring systems
  • technical support available on the portal
  • complete documentation
  • optional branding with your company logo
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Hardware

Specifications:

  • power consumption: 0.06 W
  • number of channels: 2
  • current measurement range: 0–20 mA
  • input resistance: 49.9 Ohm
  • current measurement accuracy: ±(0.1 mA + 1.5%)
  • power supply voltage: 9…28 V
  • operating temperature: −40…+80 °C
  • interface: RS-485, Modbus RTU
  • dimensions: 34 x 20 x 17 mm
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Quality control at every stage of production

All Wiren Board devices are designed and manufactured in-house. Each device undergoes a multi-stage quality control process:

  • During development: component verification against declared specifications and prototype stress testing.
  • After SMD component placement: automated optical inspection.
  • After through-hole soldering: visual inspection of solder joints.
  • After assembly: functional testing using an automated test bench.
  • Before shipping to the warehouse: inspection of packaging, labels, and external appearance.

Thanks to this approach, the failure rate is no more than 0.5% of all manufactured devices.

If the device fails within two years of purchase, we will replace it free of charge, with no need to send it to a service center.

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Configuration

When used with a Wiren Board controller, inputs can be enabled or disabled via the web interface with a mouse click.

When used with third-party equipment, the module can be configured over RS-485 by writing values to Modbus registers. The register table is open, well-documented, and available on our website.

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Reading values

If used with a Wiren Board controller, measured values are displayed in the controller’s web interface and can be used in automation scenarios or transferred to a higher-level system. Only enabled channels are shown in the device card.

The module also transmits all data via Modbus RTU (RS-485), which can be read by any device or software that supports this protocol: third-party controllers, HMI panels, or SCADA systems.

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